Nomura Fudou is sent to Private Aichi Symbiosis Academy, which is ruled by the student organization called "Five Ruling Swords". He is given the option: be expelled, or act and dress like a girl.

When Aichi Coexistence Academy converted from all-girls to a coed model, the female students were so concerned about male misbehavior that they armed themselves. Now the school is ruled by the lovely but lethal Supreme Five Swords, and the boys are forced to dress and act like girls or suffer the razor sharp points of the Swords' anger. Unfortunately for the Swords, new transfer student Fudo Nomura thinks that sounds like a total drag, and he might just have the martial arts chops and rapier wit needed to slash through the Swords' defenses and carve a new niche for himself in their feisty feminine hearts. It's a whole new kind of slice of life High School Drama, extra heavy on the "slice", as one Bad Boy meets some very Dicey Girls in Armed Girl's Machiavellism.—Sentai Filmworks

Originally, Aichi Coexistence Private Academy was an all-girls school for privileged young ladies until it was decided that it would become co-ed. The fearful girls were permitted to bring weapons to protect themselves, and then a vigilante group was established called the "Supreme Five Swords." When rebellious Nomura Fudou is sent to the academy, he is given two options: act and dress like a girl or be expelled.—Sentai Filmworks